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There are a wide variety of prescription lenses for eye glasses available for purchase. With so many options, it can make for a difficult or confusing decision. One of the newer lens technologies is incorporated in Transition Lenses. What are transition lenses and what are the benefits of wearing them? This article will help to provide the answer.

Transition lenses, otherwise known as photochromic lenses, are color changing lenses for eye glasses. These lenses are clear while worn inside and in dark settings or at night. The lenses automatically darken when exposed to ultraviolet radiation, essentially converting from regular prescription eye glasses to prescription sunglasses and protecting the wearer's eyes from 100% of harmful UVA and UVB sun rays. The photochromic technology allows for a substantial change in lens tint within the first minute of exposure to ultraviolet radiation. Lenses continue to darken over the following fifteen minutes. The process of returning to clear follows a similar pattern. Color changing lenses do not darken due to artificial lightening because the ultraviolet wavelengths from the sun trigger the change and these wavelengths do not come from artificial lighting sources.

Photochromic lenses are available, for the most part, in the same quality and variety of lenses as normal eye glass lenses and include the following: plastic, high-index plastic, polycarbonate, and Trivex lenses. A polymer film is then paired with the lenses to provide the additional reversible darkening effect for sun protection. Wearers can choose between lenses that change color to varying shades of either gray or brown depending on the lighting conditions.

Studies show that conditions such as cataracts result from recurring exposure to ultraviolet radiation. Wearing color changing lenses may lower potential risks for eye damage resulting from years of exposure to ultraviolet radiation.

Eye glass wearers that spend a lot of time working outside may benefit with these lenses since they will not have to purchase or remember to carry with them a second pair of expensive prescription sunglasses to protect their eyes.

Although many options are available for lenses, knowing the facts and benefits will help to decide which lenses are best for your personal needs.